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Stack Machine
In computer science, computer engineering and programming language implementations, a stack machine is a computer processor or a Virtual machine#Process virtual machines, process virtual machine in which the primary interaction is moving short-lived temporary values to and from a push down Stack (abstract data type), stack. In the case of a hardware processor, a hardware stack is used. The use of a stack significantly reduces the required number of processor registers. Stack machines extend push-down automata with additional load/store operations or multiple stacks and hence are Turing-complete. Design Most or all stack machine instructions assume that operands will be from the stack, and results placed in the stack. The stack easily holds more than two inputs or more than one result, so a rich set of operations can be computed. In stack machine code (sometimes called p-code), instructions will frequently have only an opcode commanding an operation, with no additional fields i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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Computer Science
Computer science is the study of computation, information, and automation. Computer science spans Theoretical computer science, theoretical disciplines (such as algorithms, theory of computation, and information theory) to Applied science, applied disciplines (including the design and implementation of Computer architecture, hardware and Software engineering, software). Algorithms and data structures are central to computer science. The theory of computation concerns abstract models of computation and general classes of computational problem, problems that can be solved using them. The fields of cryptography and computer security involve studying the means for secure communication and preventing security vulnerabilities. Computer graphics (computer science), Computer graphics and computational geometry address the generation of images. Programming language theory considers different ways to describe computational processes, and database theory concerns the management of re ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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Call Stack
In computer science, a call stack is a Stack (abstract data type), stack data structure that stores information about the active subroutines and block (programming), inline blocks of a computer program. This type of stack is also known as an execution stack, program stack, control stack, run-time stack, or machine stack, and is often shortened to simply the "stack". Although maintenance of the call stack is important for the proper functioning of most software, the details are normally hidden and automatic in high-level programming languages. Many computer instruction sets provide special instructions for manipulating stacks. A call stack is used for several related purposes, but the main reason for having one is to keep track of the point to which each active subroutine should return control when it finishes executing. An active subroutine is one that has been called, but is yet to complete execution, after which control should be handed back to the point of call. Such activatio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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UCSD Pascal
UCSD Pascal is a Pascal programming language system that runs on the UCSD p-System, a portable, highly machine-independent operating system. UCSD Pascal was first released in 1977. It was developed at the University of California, San Diego (UCSD). The p-System In 1977, the University of California, San Diego (UCSD) Institute for Information Systems developed UCSD Pascal to provide students with a common environment that could run on any of the then available microcomputers as well as campus DEC PDP-11 minicomputers. The operating system became known as UCSD p-System. There were three operating systems that IBM offered for its original IBM PC. The first was UCSD p-System, with IBM PC DOS and CP/M-86 as the other two. Vendor SofTech Microsystems emphasized p-System's application portability, with virtual machines for 20 CPUs as of the IBM PC's release. It predicted that users would be able to use applications they purchased on future computers running p-System; advertisem ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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Xerox Daybreak
Xerox Daybreak (also Xerox 6085 PCS, Xerox 1186) is a workstation computer marketed by Xerox from 1985 to 1989. Overview Daybreak is the final release in the D* (pronounced D-Star) series of machines, some of which share the Wildflower CPU design by Butler Lampson. Machines in this series include, in order, Dolphin, Dorado, Dicentra, Dandelion, Dandetiger, Daybreak, the never-manufactured Daisy, and Dragonfly "a 4-processor VLSI CPU developed at PARC and intended for a high-end printing system". It was sold as the Xerox 6085 PCS (Professional Computer System) or ViewPoint 6085 PCS when sold as an office workstation running the GlobalView, ViewPoint system. ViewPoint is based on the Star software originally developed for the Xerox Star. The 6085 ran the ViewPoint (later GlobalView) Graphical user interface, GUI and was used extensively throughout Xerox until being replaced by Sun Microsystems, Suns and IBM PC compatible, PCs. Although years ahead of its time, it was never a comm ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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Xerox Star
The Xerox Star workstation, officially named Xerox Star 8010 Information System, is the first commercial personal computer to incorporate technologies that have since become standard in personal computers, including a bitmapped display, a window-based graphical user interface, icons, folders, mouse (two-button), Ethernet networking, file servers, print servers, and email. Introduced by Xerox Corporation on April 27, 1981, the name ''Star'' technically refers only to the software sold with the system for the office automation market. The 8010 workstations were also sold with software based on the programming languages Lisp and Smalltalk for the smaller research and software development market. History The Xerox Alto The Xerox Star system's concept owes much to the Xerox Alto, an experimental workstation designed by the Xerox Palo Alto Research Center (PARC). The first Alto became operational in 1972. The Alto had been strongly influenced by what its designers had seen previ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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Advanced Architecture Microprocessor
The Advanced Party (), otherwise known as the Advanced Association () was a liberal and centrist Zionist political association in Mandatory Palestine founded by several urban liberal Zionists. The party was founded in order to represent the voice of Tel Aviv liberals and Zionists in the election to the Yishuv's Assembly of Representatives in 1920. The party placed sixth in the election, coming in behind their rural General Zionist counterrpart, Hitahdut HaIkarim. The party represents first formal General Zionist political party to be founded, and as one of the earliest political ancestors of the modern-day Likud. History Under the British Mandate, the Yishuv (Jewish community), established a network of political and administrative institutions, among them the Assembly of Representatives. Itamar Rabinovich & Jehuda Reinharz (2008''Israel in the Middle East''Brandeis University Press, p84 To ensure that small groups were properly represented, a system of proportional representati ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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Rockwell Collins
Rockwell Collins, Inc. was a multinational corporation headquartered in Cedar Rapids, Iowa, providing avionics and information technology systems and services to government agencies and aircraft manufacturers. It was formed when the Collins Radio Company, facing financial difficulties, was purchased by Rockwell International in 1973. In 2001, the avionics division of Rockwell International was spun off to form the current Rockwell Collins, Inc., retaining its name. It was acquired by United Technologies Corporation on November 27, 2018, and since then operates as part of Collins Aerospace, a subsidiary of the RTX Corporation (formerly Raytheon Technologies). History Arthur A. Collins founded Collins Radio Company in 1933 in Cedar Rapids, Iowa. It designed and produced both shortwave radio equipment and equipment for the AM radio broadcast industry. Collins supplied the military, the scientific community, and the larger AM radio stations with equipment. Collins provided the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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Collins Adaptive Processing System
Collins may refer to: People Surname Given name * Collins O. Bright (1917–?), Sierra Leonean diplomat * Collins Chabane (1960–2015), South African Minister of Public Service and Administration * Collins Cheboi (born 1987), Kenyan middle-distance runner * Collins Denny (1854–1943), American Bishop of the Methodist Episcopal Church, South * Collins Denny Jr. (1899–1964), American pro-segregationist lawyer. * Collins Hagler (born 1935), Canadian football player * Collins Injera (born 1986), Kenyan rugby player * Collins John (born 1985), Liberia-born Dutch footballer * Collins H. Johnston (1859–1936), American football player, medical doctor, surgeon, and civic leader * Collins Mbesuma (born 1984), Zambian footballer nicknamed ''The Hurricane'' or ''Ntofontofo'' * Collins Mensah (born 1961), Ghanaian sprinter * Collins Nweke (born 1965), Belgian politician of the Green Party * Collins Obuya (born 1981), Kenyan cricketer Companies * COLLINS, American design com ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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Collins Radio
Rockwell Collins, Inc. was a multinational corporation headquartered in Cedar Rapids, Iowa, providing avionics and information technology systems and services to government agencies and aircraft manufacturers. It was formed when the Collins Radio Company, facing financial difficulties, was purchased by Rockwell International in 1973. In 2001, the avionics division of Rockwell International was spun off to form the current Rockwell Collins, Inc., retaining its name. It was acquired by United Technologies Corporation on November 27, 2018, and since then operates as part of Collins Aerospace, a subsidiary of the RTX Corporation (formerly Raytheon Technologies). History Arthur A. Collins founded Collins Radio Company in 1933 in Cedar Rapids, Iowa. It designed and produced both shortwave radio equipment and equipment for the AM radio broadcast industry. Collins supplied the military, the scientific community, and the larger AM radio stations with equipment. Collins provided the equi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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English Electric KDF9
KDF9 was an early British 48-bit computer designed and built by English Electric (which in 1968 was merged into International Computers Limited (ICL)). The first machine came into service in 1964 and the last of 29 machines was decommissioned in 1980 at the National Physical Laboratory. The KDF9 was designed for, and used almost entirely in, the mathematical and scientific processing fields in 1967, nine were in use in UK universities and technical colleges. The KDF8, developed in parallel, was aimed at commercial processing workloads. The KDF9 was an early example of a machine that directly supported multiprogramming, using offsets into its core memory to separate the programs into distinct virtual address spaces. Several operating systems were developed for the platform, including some that provided fully interactive use through PDP-8 machines acting as smart terminal servers. A number of compilers were available, notably both checkout and globally optimizing compilers for ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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Burroughs Large Systems
The Burroughs Large Systems Group produced a family of large 48-bit computing, 48-bit mainframe computer, mainframes using stack machine instruction sets with dense Syllable (computing), syllables.E.g., 12-bit syllables for B5000, 8-bit syllables for B6500 The first machine in the family was the B5000 in 1961, which was optimized for compiling ALGOL 60 programs extremely well, using single-pass compilers. The B5000 evolved into the B5500 (disk rather than drum) and the B5700 (up to four systems running as a cluster). Subsequent major redesigns include the B6500/B6700 line and its successors, as well as the separate B8500 line. In the 1970s, the Burroughs Corporation was organized into three divisions with very different product line architectures for high-end, mid-range, and entry-level business computer systems. Each division's product line grew from a different concept for how to optimize a computer's instruction set for particular programming languages. "Burroughs Large Systems" ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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Konrad Zuse
Konrad Ernst Otto Zuse (; ; 22 June 1910 – 18 December 1995) was a German civil engineer, List of pioneers in computer science, pioneering computer scientist, inventor and businessman. His greatest achievement was the world's first programmable computer; the functional program-controlled Turing completeness, Turing-complete Z3 (computer), Z3 became operational in May 1941. Thanks to this machine and its predecessors, Zuse is regarded by some as the inventor and father of the modern computer. Zuse was noted for the S2 computing machine, considered the first process control computer. In 1941, he founded one of the earliest computer businesses, producing the Z4 (computer), Z4, which became the world's first commercial computer. From 1943 to 1945 he designed Plankalkül, the first high-level programming language. In 1969, Zuse suggested the concept of a digital physics, computation-based universe in his book (''Calculating Space''). Much of his early work was financed by his f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |